128751513 has 8 divisors (see below), whose sum is σ = 187274976. Its totient is φ = 78031200.

The previous prime is 128751479. The next prime is 128751529. The reversal of 128751513 is 315157821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128751513 - 2¹⁴ = 128735129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 3901561 = 128751513 / (1 + 2 + 8 + 7 + 5 + 1 + 5 + 1 + 3).

It is not an unprimeable number, because it can be changed into a prime (128751533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1950748 + ... + 1950813.

It is an arithmetic number, because the mean of its divisors is an integer number (23409372).

Almost surely, 2^128751513 is an apocalyptic number.

It is an amenable number.

128751513 is a deficient number, since it is larger than the sum of its proper divisors (58523463).

128751513 is a wasteful number, since it uses less digits than its factorization.

128751513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3901575.

The product of its digits is 8400, while the sum is 33.

The square root of 128751513 is about 11346.8723884602. The cubic root of 128751513 is about 504.9527949864.

The spelling of 128751513 in words is "one hundred twenty-eight million, seven hundred fifty-one thousand, five hundred thirteen".